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Guide

Peptide storage: powder, mixed vials, fridge, freezer and travel

How to store peptides before and after mixing, how long they last, what to do after a warm day, and how to travel with them. Every figure shows where it came from.

Updated 5 min readSources labeled by origin

In this guide · 9 sections

The short version

  • Powder (lyophilized): keep it cold, dry and dark. Guides use the fridge for weeks to months and the freezer for long-term storage.
  • Mixed vials: fridge at 2 to 8 C, never frozen, away from light. Most guides use about 28 days.
  • Opened bacteriostatic water: fridge, dated, out after 28 days.
  • Branded pens: follow the label, which is usually more generous than guides are for vials.
Sources for this section (3)
  1. Competitor guide
    How to reconstitute peptides: step-by-step guide(opens in a new tab)

    peptiq.io · checked

  2. Regulatory
    Preventing unsafe injection practices(opens in a new tab)

    CDC · checked

  3. Competitor guide
    Bacteriostatic water refrigeration(opens in a new tab)

    peptidesexplorer.com · checked

Before mixing: powder

Peptides are sold dry because they are far more stable that way; the reactions that break peptides down run much faster in solution than in the dried state.

What guides say: most keep unopened powder in the fridge and move it to the freezer (around -20 C) for long-term storage. Several call short spells at room temperature, such as shipping, acceptable for powder. These are guide conventions. For most research peptides, no published stability study gives an exact number of months.

Keep vials in their box or a dark container, and let a cold vial warm up before opening it so moisture does not condense inside.

Sources for this section (3)
  1. Clinical study
    Manning MC et al. 2010, Stability of protein pharmaceuticals: an update, Pharm Res(opens in a new tab)

    PubMed · checked

  2. Competitor guide
    Peptide travel guide(opens in a new tab)

    peptiq.io · checked

  3. Competitor guide
    How to reconstitute peptides: step-by-step guide(opens in a new tab)

    peptiq.io · checked

After mixing: the fridge, and the 28-day question

Store mixed vials in the fridge at 2 to 8 C. The back of a middle shelf holds temperature better than the door, as one guide points out. Do not freeze a mixed vial; guides agree on avoiding freeze-thaw.

Where 28 days comes from: CDC guidance, based on USP Chapter 797, is to date a punctured multi-dose vial and discard it within 28 days unless the maker says otherwise. Peptide guides borrow that number for mixed vials. It is a contamination rule for the preservative, not a stability test of your peptide. One guide's per-peptide estimates run from about a week to more than a month, and the same guide gives 24 to 48 hours for vials mixed with plain sterile water.

Practical rule: date the vial, keep it cold, and stop if it turns cloudy, grows particles or changes color.

Sources for this section (4)
  1. Regulatory
    Preventing unsafe injection practices(opens in a new tab)

    CDC · checked

  2. Competitor guide
    How long do reconstituted peptides last(opens in a new tab)

    peptidesexplorer.com · checked

  3. Competitor guide
    Bacteriostatic water refrigeration(opens in a new tab)

    peptidesexplorer.com · checked

  4. Community-reported
    Storage and discard practice for mixed vials(opens in a new tab)

    r/PeptideGuide · checked

Mixed-vial windows by compound

What our compound pages list for mixed vials, with the origin of each figure. Open a compound for the full storage notes.

  • 5-Amino-1MQ: use within 14 days in the fridge. Competitor guide.
  • Adamax: use within 28 days in the fridge. Competitor guide.
  • AOD-9604: use within 28 days in the fridge. Community-reported.
  • BPC-157 + TB-500 blend: use within 28 days in the fridge. Competitor guide.
  • BPC-157: use within 28 days in the fridge. Competitor guide.
  • Cagrilintide: use within 28 days in the fridge. Community-reported.
  • CJC-1295 (no DAC) + Ipamorelin: use within 28 days in the fridge. Competitor guide.
  • CJC-1295: use within 28 days in the fridge. Competitor guide.
  • Epitalon: use within 14 days in the fridge. Competitor guide.
  • GHK-Cu: use within 28 days in the fridge. Competitor guide.
  • GHRP-2 and GHRP-6: use within 28 days in the fridge. Competitor guide.
  • GLOW: use within 28 days in the fridge. Competitor guide.
  • IGF-1 LR3: use within 28 days in the fridge. Competitor guide.
  • Ipamorelin: use within 28 days in the fridge. Competitor guide.
  • KLOW: use within 28 days in the fridge. Competitor guide.
  • KPV: use within 28 days in the fridge. Competitor guide.
  • MOTS-c: use within 21 days in the fridge. Competitor guide.
  • NAD+: use within 28 days in the fridge. Competitor guide.
  • PT-141: use within 28 days in the fridge. Competitor guide.
  • Retatrutide: use within 28 days in the fridge. Community-reported.
  • Selank: use within 21 days in the fridge. Competitor guide.
  • Semaglutide: use within 28 days in the fridge. Competitor guide.
  • Semax: use within 21 days in the fridge. Competitor guide.
  • Sermorelin: use within 28 days in the fridge. Competitor guide.
  • SS-31: use within 28 days in the fridge. Competitor guide.
  • TB-500: use within 28 days in the fridge. Competitor guide.
  • Tesamorelin: use within 7 days in the fridge. Competitor guide.
  • Tirzepatide: use within 28 days in the fridge. Competitor guide.
Sources for this section (130)
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    5-Amino-1MQ protocol(opens in a new tab)

    peptidedosingprotocols.com · checked

  2. Competitor guide
    5-Amino-1MQ (50 mg Vial) Dosage Protocol(opens in a new tab)

    peptidedosages.com · checked

  3. Competitor guide
    Adamax(opens in a new tab)

    peptiq.io · checked

  4. Competitor guide
    Adamax Peptide Guide(opens in a new tab)

    peptidedosingprotocols.com · checked

  5. Vendor guide
    Adamax (984 Da)(opens in a new tab)

    araratpeptides.com · checked

  6. Vendor guide
    Adamax 1032(opens in a new tab)

    araratpeptides.com · checked

  7. Competitor guide
    AOD-9604 protocol(opens in a new tab)

    peptidedosingprotocols.com · checked

  8. Competitor guide
    AOD 9604 dosage and side effects(opens in a new tab)

    peptidesexplorer.com · checked

  9. Competitor guide
    AOD-9604(opens in a new tab)

    peptiq.io · checked

  10. Community-reported
    Reconstituted AOD yesterday, gel today(opens in a new tab)

    r/Biohacking · checked

  11. Competitor guide
    Wolverine peptide stack(opens in a new tab)

    peptidesexplorer.com · checked

  12. Competitor guide
    Wolverine stack dosage chart(opens in a new tab)

    peptidedeck.com · checked

  13. Competitor guide
    Wolverine stack(opens in a new tab)

    peptidedosingprotocols.com · checked

  14. Competitor guide
    BPC-157/TB-500 protocol (10 mg)(opens in a new tab)

    pathtopeptides.com · checked

  15. Competitor guide
    Wolverine stack protocol guide(opens in a new tab)

    bodyhackguide.co · checked

  16. Competitor guide
    BPC-157 compound page(opens in a new tab)

    peptiq.io · checked

  17. Competitor guide
    How to reconstitute BPC-157(opens in a new tab)

    bodyhackguide.co · checked

  18. Competitor guide
    BPC-157 dosage chart(opens in a new tab)

    peptidedeck.com · checked

  19. Competitor guide
    BPC-157 profile(opens in a new tab)

    pathtopeptides.com · checked

  20. Competitor guide
    BPC-157 dosage guide(opens in a new tab)

    peptidedeck.com · checked

  21. Competitor guide
    BPC-157 protocol(opens in a new tab)

    pathtopeptides.com · checked

  22. Competitor guide
    BPC-157 dosage(opens in a new tab)

    peptides.org · checked

  23. Competitor guide
    Cagrilintide Peptide Dosing Guide(opens in a new tab)

    peptidedosingprotocols.com · checked

  24. Competitor guide
    Cagrilintide + Retatrutide Stack Guide(opens in a new tab)

    peptidedosingprotocols.com · checked

  25. Competitor guide
    Cagrilintide Dosing Guide(opens in a new tab)

    peptidedeck.com · checked

  26. Community-reported
    How long after puncture do you toss (comment)(opens in a new tab)

    r/cagrilintide · checked

  27. Community-reported
    Cagri efficacy after 30+ days reconstituted?(opens in a new tab)

    r/Biohacking · checked

  28. Competitor guide
    CJC-1295 (no DAC) self-logged doses(opens in a new tab)

    PeptIQ · checked

  29. Competitor guide
    CJC-1295 / ipamorelin protocol(opens in a new tab)

    PathToPeptides · checked

  30. Competitor guide
    CJC-1295 no DAC protocol(opens in a new tab)

    PathToPeptides · checked

  31. Competitor guide
    How to reconstitute CJC-1295 + ipamorelin(opens in a new tab)

    PeptidesExplorer · checked

  32. Competitor guide
    CJC-1295 DAC 2 mg vial(opens in a new tab)

    PeptideDosages · checked

  33. Competitor guide
    CJC-1295 with DAC protocol(opens in a new tab)

    PathToPeptides · checked

  34. Competitor guide
    CJC-1295 (DAC)(opens in a new tab)

    PeptIQ · checked

  35. Competitor guide
    Epitalon protocol(opens in a new tab)

    peptidedosingprotocols.com · checked

  36. Competitor guide
    Epithalon + MOTS-c stack(opens in a new tab)

    pathtopeptides.com · checked

  37. Competitor guide
    Epithalon dosage guide(opens in a new tab)

    bodyhackguide.co · checked

  38. Competitor guide
    Epitalon dosing(opens in a new tab)

    peptideprotocolwiki.com · checked

  39. Competitor guide
    Epitalon(opens in a new tab)

    peptiq.io · checked

  40. Competitor guide
    Epitalon protocol(opens in a new tab)

    pathtopeptides.com · checked

  41. Vendor guide
    Epitalon protocol(opens in a new tab)

    meto.co · checked

  42. Competitor guide
    GHK-Cu dosage chart(opens in a new tab)

    peptidedeck.com · checked

  43. Competitor guide
    GHK-Cu dosing guide(opens in a new tab)

    peptiq.io · checked

  44. Competitor guide
    GHK-Cu injection dosage(opens in a new tab)

    peptidesexplorer.com · checked

  45. Competitor guide
    GHK-Cu dosage guide(opens in a new tab)

    bodyhackguide.co · checked

  46. Competitor guide
    GHK-Cu wiki(opens in a new tab)

    pathtopeptides.com · checked

  47. Competitor guide
    GHK-Cu half-life and shelf life(opens in a new tab)

    peptidedeck.com · checked

  48. Vendor guide
    GHK-Cu 50 mg product page(opens in a new tab)

    Vendor product page · checked

  49. Clinical study
    Pickart L et al. 2015, GHK peptide as a natural modulator of skin regeneration, Biomed Res Int(opens in a new tab)

    PMC · checked

  50. Competitor guide
    GHRP-2 (self-logged doses)(opens in a new tab)

    PeptIQ · checked

  51. Competitor guide
    GHRP-6 (self-logged doses)(opens in a new tab)

    PeptIQ · checked

  52. Competitor guide
    GHRP-6 5 mg vial(opens in a new tab)

    PeptideDosages · checked

  53. Competitor guide
    GLOW peptide blend dosage guide(opens in a new tab)

    peptidedeck.com · checked

  54. Competitor guide
    GLOW dosage chart(opens in a new tab)

    peptidedeck.com · checked

  55. Competitor guide
    GHK-Cu + BPC-157 + TB-500 blend dosage(opens in a new tab)

    peptidesexplorer.com · checked

  56. Competitor guide
    GLOW blend compound page(opens in a new tab)

    peptiq.io · checked

  57. Competitor guide
    GLOW stack(opens in a new tab)

    peptidedosingprotocols.com · checked

  58. Competitor guide
    GLOW 70 mg vial dosage protocol(opens in a new tab)

    peptidedosages.com · checked

  59. Competitor guide
    IGF-1 LR3 (self-logged doses)(opens in a new tab)

    PeptIQ · checked

  60. Competitor guide
    IGF-1 LR3 protocol(opens in a new tab)

    PathToPeptides · checked

  61. Competitor guide
    IGF-1 LR3 1 mg vial(opens in a new tab)

    PeptideDosages · checked

  62. Competitor guide
    Ipamorelin peptide page (self-logged doses)(opens in a new tab)

    PeptIQ · checked

  63. Competitor guide
    Ipamorelin protocol(opens in a new tab)

    PathToPeptides · checked

  64. Competitor guide
    Ipamorelin dosage guide(opens in a new tab)

    BodyHackGuide · checked

  65. Competitor guide
    Ipamorelin dosage chart(opens in a new tab)

    PeptideDeck · checked

  66. Competitor guide
    KLOW dosage chart, 80 mg blend protocol(opens in a new tab)

    peptidedosages.com · checked

  67. Competitor guide
    KLOW stack(opens in a new tab)

    peptidedosingprotocols.com · checked

  68. Competitor guide
    KLOW dosage chart(opens in a new tab)

    peptidedeck.com · checked

  69. Competitor guide
    KLOW compound page(opens in a new tab)

    peptiq.io · checked

  70. Competitor guide
    KLOW dosage guide(opens in a new tab)

    peptidedeck.com · checked

  71. Competitor guide
    KPV compound page(opens in a new tab)

    peptiq.io · checked

  72. Competitor guide
    KPV dosage chart(opens in a new tab)

    peptidedeck.com · checked

  73. Vendor guide
    KPV 10 mg product page(opens in a new tab)

    Vendor product page · checked

  74. Competitor guide
    KPV profile(opens in a new tab)

    peptidesexplorer.com · checked

  75. Competitor guide
    KPV protocol(opens in a new tab)

    pathtopeptides.com · checked

  76. Competitor guide
    BPC-157 vs KPV(opens in a new tab)

    pathtopeptides.com · checked

  77. Competitor guide
    KPV peptide(opens in a new tab)

    peptidedosages.com · checked

  78. Competitor guide
    MOTS-c quick start protocol(opens in a new tab)

    peptidedosingprotocols.com · checked

  79. Competitor guide
    MOTS-c dosing(opens in a new tab)

    peptideprotocolwiki.com · checked

  80. Competitor guide
    MOTS-c(opens in a new tab)

    peptiq.io · checked

  81. Regulatory
    FDA briefing document, PCAC July 23 to 24, 2026: MOTS-c(opens in a new tab)

    FDA · checked

  82. Vendor guide
    MOTS-c(opens in a new tab)

    peptidedeck.com · checked

  83. Vendor guide
    MOTS-c dosage protocol: 4-injection cycle(opens in a new tab)

    perfectb.com · checked

  84. Competitor guide
    NAD+ dosage chart(opens in a new tab)

    peptidedeck.com · checked

  85. Competitor guide
    NAD+ protocol(opens in a new tab)

    pathtopeptides.com · checked

  86. Competitor guide
    NAD+ Quick Start(opens in a new tab)

    peptidedosingprotocols.com · checked

  87. Competitor guide
    NAD+(opens in a new tab)

    peptiq.io · checked

  88. Competitor guide
    Bremelanotide (PT-141) protocol(opens in a new tab)

    peptidedosingprotocols.com · checked

  89. Competitor guide
    PT-141(opens in a new tab)

    peptiq.io · checked

  90. Competitor guide
    Retatrutide peptide page(opens in a new tab)

    PeptIQ · checked

  91. Competitor guide
    Retatrutide beginner's guide: reconstitution and dosing(opens in a new tab)

    PeptIQ · checked

  92. Competitor guide
    Retatrutide Protocol(opens in a new tab)

    Peptide Dosing Protocols · checked

  93. Community-reported
    Best titration/ how long does it actually last?(opens in a new tab)

    r/Retatrutide · checked

  94. Community-reported
    Titration help(opens in a new tab)

    r/Retatrutide · checked

  95. Competitor guide
    Selank dosing(opens in a new tab)

    peptideprotocolwiki.com · checked

  96. Competitor guide
    Selank quick start(opens in a new tab)

    peptidedosingprotocols.com · checked

  97. Competitor guide
    Selank(opens in a new tab)

    peptiq.io · checked

  98. Competitor guide
    Semaglutide(opens in a new tab)

    peptiq.io · checked

  99. Competitor guide
    How much bacteriostatic water to mix with 10mg semaglutide(opens in a new tab)

    SeekPeptides · checked

  100. Competitor guide
    Semaglutide(opens in a new tab)

    peptidesexplorer.com · checked

  101. Regulatory
    Ozempic Prescribing Information (rev. 01/2025)(opens in a new tab)

    FDA · checked

  102. Competitor guide
    Semax(opens in a new tab)

    peptiq.io · checked

  103. Competitor guide
    Semax(opens in a new tab)

    pathtopeptides.com · checked

  104. Competitor guide
    Sermorelin dosage guide(opens in a new tab)

    PeptideDeck · checked

  105. Competitor guide
    Sermorelin (self-logged doses)(opens in a new tab)

    PeptIQ · checked

  106. Competitor guide
    Sermorelin protocol(opens in a new tab)

    PathToPeptides · checked

  107. Competitor guide
    Sermorelin dosage chart(opens in a new tab)

    PeptidesExplorer · checked

  108. Competitor guide
    SS-31 elamipretide dosing guide(opens in a new tab)

    peptiq.io · checked

  109. Competitor guide
    SS-31 protocol(opens in a new tab)

    peptidedosingprotocols.com · checked

  110. Competitor guide
    SS-31 protocol(opens in a new tab)

    pathtopeptides.com · checked

  111. Competitor guide
    SS-31 dosage guide(opens in a new tab)

    bodyhackguide.co · checked

  112. Competitor guide
    NAD+ and SS-31 stack protocol(opens in a new tab)

    pathtopeptides.com · checked

  113. Competitor guide
    SS-31 dosage chart(opens in a new tab)

    peptidedeck.com · checked

  114. Competitor guide
    TB-500 dosage chart(opens in a new tab)

    peptidedeck.com · checked

  115. Competitor guide
    TB-500 dosage guide(opens in a new tab)

    bodyhackguide.co · checked

  116. Competitor guide
    TB-500 profile(opens in a new tab)

    pathtopeptides.com · checked

  117. Competitor guide
    TB-500 compound page(opens in a new tab)

    peptiq.io · checked

  118. Competitor guide
    TB-500 dosage guide(opens in a new tab)

    peptidedeck.com · checked

  119. Competitor guide
    TB-500 protocol(opens in a new tab)

    pathtopeptides.com · checked

  120. Competitor guide
    TB-500(opens in a new tab)

    muscleandbrawn.com · checked

  121. Competitor guide
    TB-500 complete guide(opens in a new tab)

    brainflow.co · checked

  122. Competitor guide
    Thymosin beta-4(opens in a new tab)

    peptidedeck.com · checked

  123. Regulatory
    Egrifta WR label(opens in a new tab)

    DailyMed · checked

  124. Regulatory
    Egrifta SV label(opens in a new tab)

    DailyMed · checked

  125. Competitor guide
    Tesamorelin dosage guide(opens in a new tab)

    BodyHackGuide · checked

  126. Competitor guide
    Tesamorelin protocol(opens in a new tab)

    PathToPeptides · checked

  127. Competitor guide
    Tesamorelin (self-logged doses)(opens in a new tab)

    PeptIQ · checked

  128. Vendor guide
    How much bac water to mix with 30 mg tirzepatide(opens in a new tab)

    SeekPeptides · checked

  129. Competitor guide
    Compound tirzepatide dosage chart(opens in a new tab)

    PeptidesExplorer · checked

  130. Competitor guide
    Cagrilintide + tirzepatide stack(opens in a new tab)

    PeptideDosingProtocols · checked

Branded pens and labels

Approved products come with tested storage rules on the label:

  • Ozempic: pens go in the fridge at 2 to 8 C before first use. After first use, a pen can be kept for up to 56 days at 15 to 30 C or in the fridge.
  • Zepbound: fridge at 2 to 8 C, or unrefrigerated up to 30 C for up to 21 days.

Do not apply these numbers to a compounded or research vial. They describe the tested product in its own container.

Sources for this section (2)
  1. Regulatory
    Ozempic (semaglutide) injection prescribing information(opens in a new tab)

    FDA (Drugs@FDA) · checked

  2. Regulatory
    Zepbound (tirzepatide) injection prescribing information(opens in a new tab)

    FDA (Drugs@FDA) · checked

Bacteriostatic water

Unopened bacteriostatic water is labeled for room temperature, 20 to 25 C. Once you puncture it, most guides say to move it to the fridge, write the date on it, and discard it 28 days later. Do not freeze it.

Sources for this section (3)
  1. Regulatory
    Bacteriostatic Water for Injection, USP: prescribing information(opens in a new tab)

    Pfizer (Hospira) labeling · checked

  2. Competitor guide
    Bacteriostatic water refrigeration(opens in a new tab)

    peptidesexplorer.com · checked

  3. Regulatory
    Preventing unsafe injection practices(opens in a new tab)

    CDC · checked

Left out overnight or got warm

This is one of the most searched peptide storage questions, and the honest answer is that for most research peptides nobody has published the data.

What we know: powder handles short warm spells better than solution, according to guides. Approved GLP-1 pens are tested for days to weeks at room temperature on their labels. Some competitor guides publish hour-by-hour potency loss tables for mixed vials; we have not found the studies behind those numbers, so we do not repeat them.

What to do: get it back in the fridge, look at it, and discard it if it is cloudy, has particles or changed color. A vial that spent hours in a hot car is a reasonable one to replace.

Sources for this section (4)
  1. Competitor guide
    Peptide travel guide(opens in a new tab)

    peptiq.io · checked

  2. Regulatory
    Ozempic (semaglutide) injection prescribing information(opens in a new tab)

    FDA (Drugs@FDA) · checked

  3. Competitor guide
    How long do reconstituted peptides last(opens in a new tab)

    peptidesexplorer.com · checked

  4. Reference work
    Drawing medicine out of a vial(opens in a new tab)

    MedlinePlus (U.S. National Library of Medicine) · checked

Traveling with peptides

  1. Pack peptides, syringes and swabs in your carry-on, not checked luggage, which can get very hot or cold, as travel guides advise.
  2. At US airport security, tell the officer you have medically necessary liquids before screening begins and put them in a separate bin. TSA allows unused syringes when they are with injectable medication, and used ones in a sharps or hard-surface container.
  3. Gel ice packs for medical needs are allowed even if partly melted; tell the officer.
  4. Keep mixed vials cold in an insulated bag with gel packs, and do not let them freeze against the pack.
  5. International travel is different. Rules on importing peptides vary by country, so check before you go.
Sources for this section (4)
  1. Regulatory
    Medications (liquid)(opens in a new tab)

    TSA · checked

  2. Regulatory
    Unused syringes(opens in a new tab)

    TSA · checked

  3. Regulatory
    Gel ice packs(opens in a new tab)

    TSA · checked

  4. Competitor guide
    Peptide travel guide(opens in a new tab)

    peptiq.io · checked

Signs a vial has gone bad

Look before every draw. MedlinePlus tells users of any multi-dose vial to check for a change in color, small pieces floating in the liquid, or cloudiness. Guides add a few peptide-specific notes, such as the light blue of GHK-Cu being normal while a green or brown tint is not.

Community posts describe mixed vials turning milky overnight in the fridge. No authoritative explanation exists for every case, and the safe call is to discard it.

Sources for this section (3)
  1. Reference work
    Drawing medicine out of a vial(opens in a new tab)

    MedlinePlus (U.S. National Library of Medicine) · checked

  2. Community-reported
    Mixed vial turned milky overnight in the fridge(opens in a new tab)

    r/Peptides · checked

  3. Competitor guide
    How long do reconstituted peptides last(opens in a new tab)

    peptidesexplorer.com · checked

Peptides this guide covers

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First published . Not medical advice. Sources are labeled by origin so you can judge them yourself.